Physics

Far-infrared laser

Laser

Terahertz spectroscopy and technology

Ferromagnetism

Terahertz radiation

Terahertz metamaterials

Photomixing

Optics

Terahertz gap

Spintronics

Ultrashort pulse

Materials science

Photonics

Condensed matter physics

Optoelectronics

Broadband

Applied Physics Letters

Spintronic terahertz emitters are broadband and efficient sources of terahertz radiation, which emerged at the intersection of ultrafast spintronics and terahertz photonics. They are based on efficient spin-current generation, spin-to-charge-current conversion, and current-to-field conversion at terahertz rates. In this Editorial, we review the recent developments and applications, the current understanding of the physical processes, and the future challenges and perspectives of broadband spintronic terahertz emitters.

Spintronic sources of ultrashort terahertz electromagnetic pulses